☆ 4.5 Article

Analyzing power in elastic scattering of 6He from a polarized proton target at 71 MeV/nucleon

PHYSICAL REVIEW C (2011)

期刊

PHYSICAL REVIEW C

卷 84, 期 2, 页码 -

出版社

AMER PHYSICAL SOC

DOI: 10.1103/PhysRevC.84.024604

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类别

Physics, Nuclear

资金

Japan Society for the Promotion of Science [18-11398]
Ministry of Education, Culture, Sports, Science, and Technology of Japan [17684005]
Grants-in-Aid for Scientific Research [20105003, 23540335, 17684005] Funding Source: KAKEN

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摘要

The vector analyzing power has been measured for the elastic scattering of neutron-rich He-6 from polarized protons at 71 MeV/nucleon making use of a newly constructed solid polarized proton target operated in a low magnetic field and at high temperature. Two approaches based on local one-body potentials were applied to investigate the spin-orbit interaction between a proton and a He-6 nucleus. An optical model analysis revealed that the spin-orbit potential for He-6 is characterized by a shallow and long-ranged shape compared with the global systematics of stable nuclei. A semimicroscopic analysis with an alpha+n+ n cluster folding model suggests that the interaction between a proton and the a core is essentially important in describing the p+He-6 elastic scattering. The data are also compared with fully microscopic analyses using nonlocal optical potentials based on nucleon-nucleon g matrices.

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Unbound states in 17C and p-sd shell-model interactions

S. Kim, J. W. Hwang, Y. Satou, N. A. Orr, T. Nakamura, Y. Kondo, J. GIbelin, N. L. Achouri, T. Aumann, H. Baba, F. Delaunay, P. Doornenbal, N. Fukuda, N. Inabe, T. Isobe, D. Kameda, D. Kanno, N. Kobayashi, T. Kubo, S. Leblond, J. Lee, F. M. Marques, R. Minakata, T. Motobayashi, D. Murai, T. Murakami, K. Muto, T. Nakashima, N. Nakatsuka, A. Navin, S. Nishi, S. Ogoshi, H. Otsu, H. Satoh, Y. Shimizu, H. Suzuki, K. Takahashi, H. Takeda, S. Takeuchi, R. Tanaka, Y. Togano, A. G. Tuff, M. Vandebrouck, K. Yoneda

Summary: Unbound states in 17C were studied by removing one neutron from an 18C beam at an energy of 245 MeV/nucleon on a carbon target. The energy spectrum of 17C above the single-neutron decay threshold was reconstructed using invariant mass spectroscopy, revealing resonances at 0.52(2), 0.77(2), 1.36(1), 1.91(1), 2.22(3), and 3.20(1) MeV. Through comparisons with calculations, the resonance at 0.77(2) MeV was tentatively assigned as the second 5/2+ state, while the resonances at 1.91(1) and 3.20(1) MeV were identified as p-shell hole states with spin-parities 1/2-1 and 3/2-1, respectively. A YSOX shell-model Hamiltonian based on the monopole-based universal interaction provided a good description of the results.

PHYSICS LETTERS B (2023)

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Article Astronomy & Astrophysics

Intruder configurations in Ne-29 at the transition into the island of inversion: Detailed structure study of Ne-28

H. Wang, M. Yasuda, Y. Kondo, T. Nakamura, J. A. Tostevin, K. Ogata, T. Otsuka, A. Poves, N. Shimizu, K. Yoshida, N. L. Achouri, H. Al Falou, L. Atar, T. Aumann, H. Baba, K. Boretzky, C. Caesar, D. Calvet, H. Chae, N. Chiga, A. Corsi, H. L. Crawford, F. Delaunay, A. Delbart, Q. Deshayes, Z. Dombradi, C. Douma, Z. Elekes, P. Fallon, I. Gasparic, J. M. Gheller, J. Gibelin, A. Gillibert, M. N. Harakeh, A. Hirayama, C. R. Hoffman, M. Holl, A. Horvat, A. Horvath, J. W. Hwang, T. Isobe, J. Kahlbow, N. Kalantar-Nayestanaki, S. Kawase, S. Kim, K. Kisamori, T. Kobayashi, D. Koerper, S. Koyama, I. Kuti, V. Lapoux, S. Lindberg, F. M. Marques, S. Masuoka, J. Mayer, K. Miki, T. Murakami, M. A. Najafi, K. Nakano, N. Nakatsuka, T. Nilsson, A. Obertelli, N. A. Orr, H. Otsu, T. Ozaki, V. Panin, S. Paschalis, A. Revel, D. Rossi, A. T. Saito, T. Saito, M. Sasano, H. Sato, Y. Satou, H. Scheit, F. Schindler, P. Schrock, M. Shikata, Y. Shimizu, H. Simon, D. Sohler, O. Sorlin, L. Stuhl, S. Takeuchi, M. Tanaka, M. Thoennessen, H. Toernqvist, Y. Togano, T. Tomai, J. Tscheuschner, J. Tsubota, T. Uesaka, Z. Yang, K. Yoneda

Summary: In this study, detailed ?-ray spectroscopy of the Ne-28 isotope was performed for the first time using the one-neutron removal reaction from 29Ne. Based on an analysis of momentum distributions, a level scheme with spin-parity assignments was constructed for Ne-28 and the negative-parity states were identified for the first time. The results indicate a breakdown of the N = 20 and N = 28 shell gaps, presenting a challenge for theoretical description of the transition in the Ne isotopic chain.

PHYSICS LETTERS B (2023)

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Article Multidisciplinary Sciences

First observation of 28O

Y. Kondo, N. L. Achouri, H. Al Falou, L. Atar, T. Aumann, H. Baba, K. Boretzky, C. Caesar, D. Calvet, H. Chae, N. Chiga, A. Corsi, F. Delaunay, A. Delbart, Q. Deshayes, Zs. Dombradi, C. A. Douma, A. Ekstrom, Z. Elekes, C. Forssen, I. Gasparic, J. -M. Gheller, J. Gibelin, A. Gillibert, G. Hagen, M. N. Harakeh, A. Hirayama, C. R. Hoffman, M. Holl, A. Horvat, A. Horvath, J. W. Hwang, T. Isobe, W. G. Jiang, J. Kahlbow, N. Kalantar-Nayestanaki, S. Kawase, S. Kim, K. Kisamori, T. Kobayashi, D. Koerper, S. Koyama, I. Kuti, V. Lapoux, S. Lindberg, F. M. Marques, S. Masuoka, J. Mayer, K. Miki, T. Murakami, M. Najafi, T. Nakamura, K. Nakano, N. Nakatsuka, T. Nilsson, A. Obertelli, K. Ogata, F. de Oliveira Santos, N. A. Orr, H. Otsu, T. Otsuka, T. Ozaki, V. Panin, T. Papenbrock, S. Paschalis, A. Revel, D. Rossi, A. T. Saito, T. Y. Saito, M. Sasano, H. Sato, Y. Satou, H. Scheit, F. Schindler, P. Schrock, M. Shikata, N. Shimizu, Y. Shimizu, H. Simon, D. Sohler, O. Sorlin, L. Stuhl, Z. H. Sun, S. Takeuchi, M. Tanaka, M. Thoennessen, H. Toernqvist, Y. Togano, T. Tomai, J. Tscheuschner, J. Tsubota, N. Tsunoda, T. Uesaka, Y. Utsuno, I. Vernon, H. Wang, Z. Yang, M. Yasuda, K. Yoneda, S. Yoshida

Summary: Subjecting a physical system to extreme conditions is a common method to gain a better understanding of its organization and structure. The investigation of isotopes with different neutron-to-proton ratios than stable nuclei is an important test for nuclear-structure theories. This study reports the first observation of the decay of O-28 and 27O isotopes and compares their decay energies with theoretical models. The results have implications for the understanding of nuclear structure.

NATURE (2023)

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Article Physics, Nuclear

STRASSE: a silicon tracker for quasi-free scattering measurements at the RIBF

H. N. Liu, F. Flavigny, H. Baba, M. Boehmer, U. Bonnes, V. Borshchov, P. Doornenbal, N. Ebina, M. Enciu, A. Frotscher, R. Gernhaeuser, V. Girard-Alcindor, D. Goupilliere, J. Heuser, R. Kapell, Y. Kondo, H. Lee, J. Lehnert, T. Matsui, A. Matta, T. Nakamura, A. Obertelli, T. Pohl, M. Protsenko, M. Sasano, Y. Satou, C. J. Schmidt, K. Schuenemann, C. Simons, Y. L. Sun, J. Tanaka, Y. Togano, T. Tomai, I. Tymchuk, T. Uesaka, R. Visinka, H. Wang, F. Wienholtz

Summary: This study describes a new detection system under construction for quasi-free scattering measurements at the RIBF facility. The system consists of a charged-particle silicon tracker coupled with a dedicated thick liquid hydrogen target and aims to achieve high precision in missing-mass measurements and in-flight prompt γ-ray spectroscopy.

EUROPEAN PHYSICAL JOURNAL A (2023)

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Article Physics, Nuclear

Spin correlation coefficient for proton-3He elastic scattering at 100 MeV

A. Watanabe, S. Nakai, K. Sekiguchi, A. Deltuva, S. Goto, K. Hatanaka, Y. Hirai, T. Ino, D. Inomoto, M. Inoue, S. Ishikawa, M. Itoh, H. Kanda, H. Kasahara, Y. Maeda, K. Miki, K. Nonaka, H. J. Ong, H. Oshiro, D. Sakai, H. Sakai, S. Shibuya, D. T. Tran, H. Umetsu, Y. Utsuki, T. Wakasa

Summary: In this study, the measured spin correlation coefficient and cross section data for p-He-3 elastic scattering were compared with theoretical calculations. It was found that there are significant differences in the regime around the cross section minimum for both observables. The inclusion of Delta isobar effects and three-nucleon forces improved the agreement between the theoretical results and experimental data.

PHYSICAL REVIEW C (2022)

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Article Physics, Nuclear

Coupled-channel description for mirror mass-11 nuclei compared to shell-model structures

K. Amos, S. Karataglidis, L. Canton, P. R. Fraser, K. Murulane

Summary: The spectra of mass-11 nuclei are complex, with variations in binding states and stability. Understanding these differences requires the use of the Multi-Channel Algebraic Scattering method and collective model descriptions.

EUROPEAN PHYSICAL JOURNAL A (2022)

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Article Physics, Nuclear

Border of the island of inversion: Unbound states in 29Ne

M. Holl, S. Lindberg, A. Heinz, Y. Kondo, T. Nakamura, J. A. Tostevin, H. Wang, T. Nilsson, N. L. Achouri, H. Al Falou, L. Atar, T. Aumann, H. Baba, K. Boretzky, C. Caesar, D. Calvet, H. Chae, N. Chiga, A. Corsi, H. L. Crawford, F. Delaunay, A. Delbart, Q. Deshayes, P. Diaz Fernandez, Z. Dombradi, C. A. Douma, Z. Elekes, P. Fallon, I Gasparic, J-M Gheller, J. Gibelin, A. Gillibert, M. N. Harakeh, A. Hirayama, C. R. Hoffman, A. Horvat, A. Horvath, J. W. Hwang, T. Isobe, J. Kahlbow, N. Kalantar-Nayestanaki, S. Kawase, S. Kim, K. Kisamori, T. Kobayashi, D. Koerper, S. Koyama, I Kuti, V Lapoux, F. M. Marques, S. Masuoka, J. Mayer, K. Miki, T. Murakami, M. Najafi, K. Nakano, N. Nakatsuka, A. Obertelli, F. de Oliveira Santos, N. A. Orr, H. Otsu, T. Ozaki, V Panin, S. Paschalis, A. Revel, D. Rossi, A. T. Saito, T. Y. Saito, M. Sasano, H. Sato, Y. Satou, H. Scheit, F. Schindler, P. Schrock, M. Shikata, Y. Shimizu, H. Simon, D. Sohler, O. Sorlin, L. Stuhl, S. Takeuchi, M. Tanaka, M. Thoennessen, H. Toernqvist, Y. Togano, T. Tomai, J. Tscheuschner, J. Tsubota, T. Uesaka, Z. Yang, M. Yasuda, K. Yoneda

Summary: In this study, the unbound states of Ne-29 were investigated for the first time. Through analyzing resonance properties, partial cross sections, and momentum distributions, some important conclusions were drawn, including the first evidence for f(7/2) single particle strength in Ne-29.

PHYSICAL REVIEW C (2022)

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